The spleen is generally regarded as an appendage to the absorbent system. Tiedemann and Gmelin consider that its specific function is to secrete from the blood a fluid which possesses the property of coagulation, and which is carried to the thoracic duct, and then, being united with the chyle, converts it into blood, and causes an actual communication between the arterial and absorbent systems. According, however, to Dr. Bostock, there is a fatal objection to this, namely, that animals have been known to live an indefinite length of time after the removal of the spleen, without any obvious injury to their functions, which could not have been the case if the spleen had been essentially necessary for so important a process. A knowledge of the diseases of the spleen in the dog appears to be less advanced than in any other animal. In the cases that I have seen, the earliest indications were frequent vomiting, and the discharge of a yellow, frothy mucus. The animal appeared uneasy, shivering, the ears cold, the eyes unnaturally protuberant, the nostrils dilated, the flanks agitated, the respiration accelerated, and the mucous membranes pale. The best treatment I know is the administration, twice in the day, of a ball composed of a grain of calomel and the same quantity of aloes, and five grains of ginger. The dog frequently cries out, both when he is moved and when he lies on his bed. In the course of three days the yellow mucus is generally disappearing, and the expression of pain is materially diminished. If the bowels are much constipated after two days have passed, two scruples of aloes may be given, and a grain of calomel; frequent injections may also be administered. We are almost totally ignorant of the functions of the 'pancreas'. It probably is concerned in assimilating the food, and converting the chyme of the stomach into chyle. INFLAMMATION OF THE KIDNEY is a serious and dangerous malady. This organ is essentially vascular in its texture; and although it is small in volume, yet, on account of the quantity of blood which it contains, and the rapidity with which its secretions are performed, it is disposed to frequent and dangerous inflammation. The immediate causes of inflammatory action in this viscus are blows and contusions in the lumbar region; hard work long continued, and the imprudent use of stimulating substances employed as aphrodisiacs; the presence of calculi in the kidney, and the arrest of the urine in the bladder. The whole of the kidney may be affected with anæmia or defect of blood, or this may be confined to the cortical substance, or even to the tubular. The kidneys are occasionally much larger than usual, without any other change of structure; or simple hypertrophy may affect but one of them. They are subject to atrophy, which may be either general or partial; or one of the kidneys may be completely wanting, and this evidently the consequence of violence or disease.